Are you addicted to forums? Do you spend too much time talking about other people on forums? If you do then you may be a loser. With your time that you have you can spend it anyway you want. Some people choose to do it on forums instead of doing something productive.
If you're chatting on a business forum then you could of course be doing some work. Just look at the top performers in any industry. You won't see them chatting away on a forum or facebook. They will actually be working and whenever they go on any forum they just shake their heads at the people who stick around to post.
Of course being on a forum is good only if you're the owner of the forum and you benefit from it.
Otherwise it's better to spend your time doing work or living your life, not spending it on a forum talking about someone else's life.